Sorry, I posted my comment #114 before seeing the rest of the comments in the thread. I thought I had seen them all, but apparently not.
I followed some advice (re-enable kms, disable dri and change driver to intel in xorg.conf) from Chris' link in his comment #113, and *so far* I am not having any lockups, and my screen res is back to 1280x1024.
Sorry, I posted my comment #114 before seeing the rest of the comments in the thread. I thought I had seen them all, but apparently not.
I followed some advice (re-enable kms, disable dri and change driver to intel in xorg.conf) from Chris' link in his comment #113, and *so far* I am not having any lockups, and my screen res is back to 1280x1024.